The 799 heads cc are smaller compared to its counterparts because of its smaller combustion chamber. The 799/243 will kill what little compression you have now unless you mill them. The distinguishing feature of this particular engine is its cast iron cylinder heads; while all other versions have aluminum heads, the version released in 1999-2000 had cast iron ones instead. Both the 243 and the 799 cylinder heads are General Motors 3rd generation cylinder heads designed for V8 trucks, performance engines, and SUVs. This top-of-the-line cylinder head assembly offers increased performance without sacrificing reliability or durability, making it an ideal choice for any hot rodder or drag racer looking to up their game. Knowing youre running high octane and having the before-mentioned 160-degree thermostat opens up the tuning window. With these results it's clear that if you're after maximum performance then investing in some 799 head will give you more bang for your buck! They can be cut to 2.000-inch to fit the standard valve seats and extend the rpm range up to 7,000 rpm. Scroungers are known to CNC port the 862/706 heads to get them to outflow the more expensive Gen IV 243/799 head. The result: increased horsepower with improved fuel efficiency. The alternator, sometimes called a generator, generates electricity to charge the battery and power all the electric auxiliaries while driving. CNC Ported 862 LS Heads- The Ultimate New Gen Cylinder Heads The CNC Ported 862 LS Heads are the most demanding cylinder heads in the modern era. It also accommodates a 90mm throttle body, but doesnt clear the truck accessory drive without modification. I have 2007 5.3 Tahoe, oil leaks is happening and I feel like all gaskets are burnt up. Want to dress engine up. someone to get original picture of motor and transmission with this trim and year of truck its much appreciated. In addition, the 799 heads deliver increased power output on the 5.3-liter truck engine. A higher compression ratio leads to increased power output, which also means increased heat inside the engine. The main difference between the two is from which mold casting the two cylinder heads originally came. As stated above they are the same as 243 heads with a different casting method. Pulling 799 Heads off a RARE LS Powered Junkyard Vehicle for CHEAP + Turbo LS Nova Streetcaring SPPTV 40.3K subscribers Subscribe 140K views 3 years ago This time on SPPTV we head to our.

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